i think you left a few things out.
the smoother a barrel is does make it more accurate. which as you would say causes less minor deformaties so the air jets it out evenly. and porting does do somthing other than slow the ball down, at the very end of the barrel where the bal escapes, there is usually a loud pop which is form the air presure escaping. if there is less air pressure "wobling" the ball at the end of its aim in the barrel.
i believe closed bolt guns get more range for two reasons.
mainly because that a blowback gun always releases some air before the ball is actually in the barrel which gives the ball less propulsion.
and the bolt is at rest and less friction due to the breech and form escaped air.
i agree with you that the bolt doesnt matter because the air in the gun wants to return to its normal pressure of 1atm,
if you fire, the air wil always escape the same way.
Proud owner of team free ballers
(doc's team sucks)
m98 with SET (short as electric) trigger and CFU (choice fire unit)
this gun is alll pnuematic.
cocker 2001 with benchmark frame and exel barrel
STUPIDITY SHOULD BE PAINFUL .
THE STUPID PEOPLE ARE BREDDING FASTER THAN THE REST OF US HEEEEEEEEELLLLPPPPPP!!!!!!